In most tree species in the British Isles a single tree-ring is produced each year and the tree-ring’s width varies in response to environmental factors, particularly rainfall and temperature.
Human in fl uence on climate change is one of the most important environmental challenges with profound implications on fresh water supply and natural ecosystems (IPCC, 2013).
Therefore, long-term river fl ow records are required to develop suitable water resource management policies.
Nonetheless, this is greatly hampered due to the short span of observational river fl ow records available in India, spanning the past few decades in case of most Himalayan rivers except for the Satluj river, which extends back to the early 1920s (Bhutiyani et al., 2008).
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